Discovery of Rn-229 and the Structure of the Heaviest Rn and Ra Isotopes from Penning-Trap Mass Measurements

Date
2009
Author
Breitenfeldt, M.
Neidherr, D.
Audi, G.
Beck, D.
Blaum, K.
Boehm, Ch.
Casten, R. F.
George, S.
Herfurth, F.
Herlert, A.
Kellerbauer, A.
Kowalska, M.
Lunney, D.
Minaya-Ramirez, E.
Naimi, S.
Noah, E.
Penescu, L.
Rosenbusch, M.
Schwarz, S.
Schweikhard, L.
Stora, T.
Cakirli, Rabia Burcu
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Abstract
The masses of the neutron-rich radon isotopes Rn223-229 have been determined for the first time, using the ISOLTRAP setup at CERN ISOLDE. In addition, this experiment marks the first discovery of a new nuclide, Rn-229, by Penning-trap mass measurement. The new, high-accuracy data allow a fine examination of the mass surface, via the valence-nucleon interaction delta V-pn. The results reveal intriguing behavior, possibly reflecting either a N=134 subshell closure or an octupolar deformation in this region.
URI
http://hdl.handle.net/20.500.12627/152166
https://doi.org/10.1103/physrevlett.102.112501
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